+dnl =================================================================
+dnl On most platforms select() does not support fd numbers above
+dnl FD_SETSIZE, as a result Privoxy can't handle more than
+dnl approximately FD_SETSIZE/2 client connections.
+dnl On some platforms the value can be changed at compile time,
+dnl on others it's hardcoded and requires recompilation of the OS.
+dnl Only relevant if select() is actually being used.
+dnl =================================================================
+AC_ARG_WITH(fdsetsize,
+ [ --with-fdsetsize=n Optimistically redefine FD_SETSIZE with the intend to change the number of connections Privoxy can handle. Dangerous if the platform doesn't support this. Pointless if Privoxy can use poll() instead of select().],
+ [
+ if test "x$withval" != "xyes"; then
+ AC_DEFINE_UNQUOTED(FD_SETSIZE,$with_fdsetsize,[Relevant for select(). Not honoured by all OS.])
+ echo "Redefining FD_SETSIZE to $with_fdsetsize."
+ AC_MSG_WARN(On platforms that don't support FD_SETSIZE redefinition it may cause memory corruption.)
+ else
+ AC_MSG_ERROR(--with-fdsetsize used without value)
+ fi
+ ]
+)
+
+dnl =================================================================
+dnl Support for thread-safe versions of gethostbyaddr, gethostbyname,
+dnl gmtime and localtime
+dnl =================================================================
+
+dnl Next line needed to find the gethost*_r functions on Solaris
+AC_CHECK_LIB(nsl, gethostbyname)
+
+AC_CHECK_FUNC(gethostbyaddr_r, [
+ AC_MSG_CHECKING([signature of gethostbyaddr_r])
+ AC_TRY_COMPILE([
+# include <netdb.h>
+ ], [
+ struct hostent *h, *hp;
+ char *a, *b;
+ int l, bl, t, e;
+ (void) gethostbyaddr_r(a, l, t, h, b, bl, &hp, &e)
+ ], [
+ AC_DEFINE(HAVE_GETHOSTBYADDR_R_8_ARGS)
+ AC_MSG_RESULT([8 args])
+ ], [
+ AC_TRY_COMPILE([
+# include <netdb.h>
+ ], [
+ struct hostent *h;
+ char *a, *b;
+ int l, bl, t, e;
+ (void) gethostbyaddr_r(a, l, t, h, b, bl, &e)
+ ], [
+ AC_DEFINE(HAVE_GETHOSTBYADDR_R_7_ARGS)
+ AC_MSG_RESULT([7 args])
+ ], [
+ AC_TRY_COMPILE([
+# include <netdb.h>
+ ], [
+ struct hostent_data *d;
+ struct hostent *h;
+ char a,
+ int l, t;
+ (void) gethostbyaddr_r(a, l, t, h, d)
+ ], [
+ AC_DEFINE(HAVE_GETHOSTBYADDR_R_5_ARGS)
+ AC_MSG_RESULT([5 args])
+ ], [
+ AC_MSG_RESULT(unrecognised)
+ ])
+ ])
+ ])
+], [
+ AC_MSG_RESULT(no)
+])
+
+AC_CHECK_FUNC(gethostbyname_r, [
+ AC_MSG_CHECKING([signature of gethostbyname_r])
+ AC_TRY_COMPILE([
+# include <netdb.h>
+ ], [
+ struct hostent *h, *r;
+ char *n, *b;
+ int bl, e;
+ (void) gethostbyname_r(n, h, b, bl, &r, &e)
+ ], [
+ AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARGS)
+ AC_MSG_RESULT([6 args])
+ ], [
+ AC_TRY_COMPILE([
+# include <netdb.h>
+ ], [
+ struct hostent *h;
+ char *n, *b;
+ int bl, e;
+ (void) gethostbyname_r(n, h, b, bl, &e)
+ ], [
+ AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARGS)
+ AC_MSG_RESULT([5 args])
+ ], [
+ AC_TRY_COMPILE([
+# include <netdb.h>
+ ], [
+ struct hostent_data *d;
+ struct hostent *h;
+ char *n,
+ (void) gethostbyname_r(n, h, d)
+ ], [
+ AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARGS)
+ AC_MSG_RESULT([3 args])
+ ], [
+ AC_MSG_RESULT(unrecognised)
+ ])
+ ])
+ ])
+], [
+ AC_MSG_RESULT(no)
+])
+
+AC_CHECK_FUNC(gmtime_r, [
+ AC_MSG_CHECKING([signature of gmtime_r])
+ AC_TRY_COMPILE([
+# include <time.h>
+ ], [
+ struct time *t;
+ struct tm *tm;
+ (void) gmtime_r(t, tm)
+ ], [
+ AC_MSG_RESULT(ok)
+ AC_DEFINE(HAVE_GMTIME_R)
+ ], [
+ AC_MSG_RESULT(unrecognised)
+ ])
+], [
+ AC_MSG_RESULT(no)
+])
+
+AC_CHECK_FUNC(localtime_r, [
+ AC_MSG_CHECKING([signature of localtime_r])
+ AC_TRY_COMPILE([
+# include <time.h>
+ ], [
+ struct time *t;
+ struct tm *tm;
+ (void) localtime_r(t, tm)
+ ], [
+ AC_MSG_RESULT(ok)
+ AC_DEFINE(HAVE_LOCALTIME_R)
+ ], [
+ AC_MSG_RESULT(unrecognised)
+ ])
+], [
+ AC_MSG_RESULT(no)
+])